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Dynamics Review

Total questions: 79

Worksheet time: 50mins

Name
Class
Date
1.

An object's acceleration is zero when forces acting on that object are:

a)

balanced

b)

unbalanced

c)

positive

d)

negative

2.

An object will accelerate when the forces acting on that object are:

a)

unbalanced

b)

balanced

c)

positive

d)

negative

3.

An object is experiencing an applied force of 8 N and a maximum static friction force of 10 N. Is the object moving?

a)

Yes

b)

No

4.

An object is experiencing an applied force of -8 N and a maximum static friction force of 10 N. What is the force of static friction acting on the object? (a)   N

5.

An object is experiencing an applied force of +20 N and a maximum static friction force of 35 N. What is the force of static friction acting on the object? (a)   N

6.

An object is experiencing an applied force of -30 N and a maximum static friction force of 35 N. What is the force of static friction acting on the object? (a)   N

7.

An object is experiencing an applied force of 15 N and a maximum static friction force of 10 N. Is the object moving?

a)

Yes

b)

No

8.

If it takes more force to move a bowling ball than a baseball, which of Newton's laws would explain this?

a)

Newton's First Law

b)

Newton's Second Law

c)

Newton's Third Law

d)

None of Newton's Laws

9.

Which of Newton's laws can be represented by the equation ΣF=ma\Sigma F=ma ?

a)

Newton's First Law

b)

Newton's Second Law

c)

Newton's Third Law

d)

None of Newton's Laws

10.

Which of Newton's laws describes why a bird pushing down on the air with its wings would experience an upward force?

a)

Newton's First Law

b)

Newton's Second Law

c)

Newton's Third Law

d)

None of Newton's Laws

11.

Which of Newton's laws describes why a cannon moves backwards after firing a cannonball?

a)

Newton's First Law

b)

Newton's Second Law

c)

Newton's Third Law

d)

None of Newton's Laws

12.

Which of Newton's laws describes why bowling pins fly backwards after being hit by a bowling ball?

a)

Newton's First Law

b)

Newton's Second Law

c)

Newton's Third Law

d)

None of Newton's Laws

13.

Which of Newton's laws describes why when an ascending elevator suddenly stops blood rushes to your head?

a)

Newton's First Law

b)

Newton's Second Law

c)

Newton's Third Law

d)

None of Newton's Laws

14.

Which of Newton's laws is: an object at rest stays at rest and an object in motion stays in motion unless acted on by a net external force?

a)

Newton's First Law

b)

Newton's Second Law

c)

Newton's Third Law

d)

None of Newton's Laws

15.

Which of Newton's Laws is also known as the Law of Inertia?

a)

Newton's First Law

b)

Newton's Second Law

c)

Newton's Third Law

d)

None of Newton's Laws

16.

Which of Newton's Laws describes why several dogs pulling a sled cause it to move faster than just one dog pulling the same sled?

a)

Newton's First Law

b)

Newton's Second Law

c)

Newton's Third Law

d)

None of Newton's Laws

17.

Which of Newton's Laws states: when one object exerts a force on a second object, the second object exerts an equal, but opposite force on the first object?

a)

Newton's First Law

b)

Newton's Second Law

c)

Newton's Third Law

d)

None of Newton's Laws

18.

Which of Newton's Laws describes the following situation: a car crashes into a tree and the driver flies through the windshield?

a)

Newton's First Law

b)

Newton's Second Law

c)

Newton's Third Law

d)

None of Newton's Laws

19.

Which of Newton's Laws describes why when two balls are hit with an equal force, the lighter ball travels faster than the heavier ball?

a)

Newton's First Law

b)

Newton's Second Law

c)

Newton's Third Law

d)

None of Newton's Laws

20.

Which of Newton's Laws describes why the plates stay on the table when the tablecloth is pulled off?

a)

Newton's First Law

b)

Newton's Second Law

c)

Newton's Third Law

d)

None of Newton's Laws

21.

Which of Newton's Laws describes why the floor pushes up as a person's foot pushes down?

a)

Newton's First Law

b)

Newton's Second Law

c)

Newton's Third Law

d)

None of Newton's Laws

22.

Which of Newton's Laws describes why pushing a child on a swing requires less force than pushing an adult?

a)

Newton's First Law

b)

Newton's Second Law

c)

Newton's Third Law

d)

None of Newton's Laws

23.

Which of Newton's Laws describes why a golf ball will continue to roll until friction stops it?

a)

Newton's First Law

b)

Newton's Second Law

c)

Newton's Third Law

d)

None of Newton's Laws

24.

Which of Newton's Laws describes why a soccer ball will not move until it is kicked?

a)

Newton's First Law

b)

Newton's Second Law

c)

Newton's Third Law

d)

None of Newton's Laws

25.

Which of Newton's Laws describes why it requires less force to pull an empty wagon than a wagon with someone in it?

a)

Newton's First Law

b)

Newton's Second Law

c)

Newton's Third Law

d)

None of Newton's Laws

26.

Which of Newton's Laws describes why you are pushed back into your seat as an airplane takes off?

a)

Newton's First Law

b)

Newton's Second Law

c)

Newton's Third Law

d)

None of Newton's Laws

27.

Which of Newton's Laws describes why it requires less force to push an empty cart than one that is full of groceries?

a)

Newton's First Law

b)

Newton's Second Law

c)

Newton's Third Law

d)

None of Newton's Laws

28.

A swimmer pushes backward on the water and moves forward. This is an example of which of Newton's Laws?

a)

Newton's First Law

b)

Newton's Second Law

c)

Newton's Third Law

d)

None of Newton's Laws

29.

Paddling a canoe would be an example of which of Newton's Laws?

a)

Newton's First Law

b)

Newton's Second Law

c)

Newton's Third Law

d)

None of Newton's Laws

30.

Which of Newton's Laws describes why a pitched baseball goes faster than one that is gently thrown?

a)

Newton's First Law

b)

Newton's Second Law

c)

Newton's Third Law

d)

None of Newton's Laws

31.

Which of Newton's Laws describes why a balloon will fly around a room as the air is let out?

a)

Newton's First Law

b)

Newton's Second Law

c)

Newton's Third Law

d)

None of Newton's Laws

32.

Sitting in a chair, you exert a force on the chair and it exerts an equal force on you would be considered an example of which of Newton's laws?

a)

Newton's First Law

b)

Newton's Second Law

c)

Newton's Third Law

d)

None of Newton's Laws

33.

Which of Newton's Laws describes why it takes less force to move a bicycle than a motorcycle?

a)

Newton's First Law

b)

Newton's Second Law

c)

Newton's Third Law

d)

None of Newton's Laws

34.

Kinetic friction is

a)

friction that acts between surfaces that are moving against each other

b)

friction that acts between surfaces that are not moving against each other

c)

does not move an object

d)

the measure of inertia

35.

When does static friction apply?

a)

When the object is at rest in relationship to the surface it is sitting on.

b)

When the object is moving in relationsihp to the surface it is sitting on.

c)

When the object is falling through the air.

d)

When the object is suspended from a rope.

36.

Which direction does normal force point in?

a)

Perpendicular to the surface

b)

Upward

c)

Downward

d)

Left or Right

37.

What formula do you use to calculate the force of gravity or weight acting on an object?

a)

Fg=mgF_g=mg

b)

ΣF=ma\Sigma F=ma

c)

∣Fs∣≤μ∣FN∣\left|F_s\right|\le\mu\left|F_N\right|

d)

∣Fk∣=μ∣FN∣\left|F_k\right|=\mu\left|F_N\right|

38.

ΣF\Sigma F is the:

a)

net force

b)

the force I want to find

c)

forces going downwards, always equivalent to mass times gravity

d)

force going in one direction

39.

What is the SI unit for mass?

a)

kg

b)

g

c)

N

40.

Is force a vector or scalar?

(a)  

41.

What is the SI unit of force?

a)

Newton

b)

Isaacs

c)

Pound

d)

mkgs\frac{m}{kgs}

42.

Which can be only be found in ropes, cords, cables, strings, etc.?

a)

Tension

b)

Normal force

c)

Gravitational force

d)

Friction

43.

Which type of friction is stronger?

(a)  

44.

This image is an example of which law?

a)

Newton's First Law

b)

Newton's Second Law

c)

Newton's Third Law

d)

None of Newton's Laws

45.

This image is an example of which law?

a)

Newton's First Law

b)

Newton's Second Law

c)

Newton's Third Law

d)

None of Newton's Laws

46.

Which of the following is the correct definition of inertia?

a)

the resistance of an object to a change in velocity

b)

the mass of an object

c)

the resistance of an object to force

d)

Newton's first law

47.

The first law of motion states: an object at rest stays at rest and an object in motion stays in motion unless acted on by a:

a)

net external force

b)

changing force

c)

net internal force

d)

external force

48.

Newton's thir law states that whenever one object exerts a force on a second object, the second object:

a)

exerts an equal, but opposite force on the first object.

b)

moves in the direction of the force.

c)

exerts an equal force in the same direction on another object.

d)

compresses as a result of the force.

49.

If you double the mass of an object but apply the same force to it, the acceleration will:

a)

be cut in half.

b)

double.

c)

triple.

d)

stay the same.

50.

If the person is motionless, what are the force acting on them?

a)

tension and gravity

b)

friction and gravity

c)

none

d)

normal force and gravity

51.

After a cannonball is fired into frictionless space, the amount of force needed to keep it going equals

a)

zero, since no force is required to keep it moving.

b)

twice the force with which it was fired.

c)

half the force with which it was fired.

d)

the same amount of force with which it was fired.

52.

Which of the following objects will require the most force to obtain an acceleration of 10 m/s2?

a)

a commerical airplane

b)

a roll of toilet paper

c)

a small car

d)

a pickup truck

53.

If the type of friction acting on an object is static, how much acceleration will the object have?

a)

0 m/s2

b)

9.8 m/s2

c)

5 m/s2

d)

Not enough information to answer

e)

6.2 m/s2

54.

What force is always present when drawing a force diagram?

(a)  

55.

What is the force that prevents one object from moving or falling through other objects?

a)

Normal force

b)

Frictional force

c)

Gravitational force

d)

Tension force

56.

What is the unit of coefficients of friction?

a)

newton

b)

kilogram

c)

m/s2

d)

they don't have units

57.

What direction is the direction of the net force for this object?

(a)  

58.

The magnitude of the net force acting on this object is (a)   N.

59.

If up is positive, then the net force acting on the object will be (a)   N

60.

Which direction is the box accelerating?

(a)  

61.

Which direction is the object accelerating?

(a)  

62.

What is the net force acting on the object if up is positive? (a)   N

63.

Which of the following forces must be included in the vertical net force of the box?

a)

Weight

b)

Normal force

c)

Tension

d)

Tension in the y-direction

e)

Tension in the x-direction

64.

A student drops a ball onto the floor and it bounces. Which of the following statements about the interaction between the ball and the floor is correct?

a)

The floor applies the same amount of force to the ball that the ball applies to the floor, which causes the ball to bounce.

b)

The floor applies a larger amount of force to the ball than the ball applies to the floor, which causes the ball to bounce.

c)

The floor applies a larger amount of force to the ball than the ball applies to the floor because it is a part of the Earth.

d)

The ball applies a larger amount of force to the floor than the floor applies to the ball because the ball bounces.

65.

Sami wants to build the fastest racing bike possible. What is one way he can change the bike, so she has a better chance of winning the race?

a)

reduce the mass of the bike so it accelerates more quickly

b)

put on smoother tires to eliminate friction with the race track

c)

increase the mass of the bike to increase its gravitational field

d)

replace metal parts with plastic to decreases its magnetic field

66.

The force diagram for an object that is being dragged across the floor is shown to the right. The object is experiencing an acceleration of 2 m/s2 as it moves under the influence of the forces shown. Use the diagram to determine the force of friction acting on the object.

a)

The force of friction is 30 newtons.

b)

The force of friction is 50 newtons.

c)

The force of friction is 20 newtons.

d)

The force of friction is 150 newtons.

67.

What is the net force for an object with a constant velocity of 10 m/s?

a)

Zero

b)

Less than 10 N but greater than 0

c)

Greater than 10 N

d)

10 N

e)

Less than 0 N

68.

The weight of an object can change when the object enters into a region with stronger or weaker gravity.

a)

True

b)

False

69.

The mass of an object can change when the object enters into a region with stronger or weaker gravity.

a)

True

b)

False

70.

A 60.0-kg sprinter starts a race with an acceleration of 5 m/s2. What is the net external force on him?

a)

30 N

b)

300 N

c)

18 N

d)

180 N

71.

A 20N of force was applied to a 10 kg box. What is its acceleration?

a)

2 m/s2

b)

200 m/s2

c)

10 m/s2

d)

0.2 m/s2

e)

0.5 m/s2

72.

While watching Netflix, the laptop was at rest on top of a table. What force(s) is(are) present on the laptop?

a)

None

b)

Normal Force

c)

Normal Force and Gravity

d)

Gravity

e)

Normal Force, Tension, and Gravity

73.

An object weighs 50 N on Earth. What is its approximate mass?

a)

5 kg

b)

500 kg

c)

50 kg

d)

10 kg

74.

When you are free falling, what is the only force acting upon you?

a)

normal force

b)

force of gravity

c)

tension force

d)

magnetic force

75.

If you are traveling with a constant velocity, what is your acceleration?

a)

Zero

b)

Positive non-zero

c)

Negative non-zero

76.

A 5.0 kilogram box is sliding across a level floor. The box is acted upon by a force of 27 newtons east and frictional force of 17 newtons west. What is the magnitude of the acceleration of the box?

a)

0.50 m/s^2

b)

2.0 m/s^2

c)

8.8 m/s^2

d)

10. m/s^2

77.

If object 1 is lighter than object 2 and they are both being pushed by THE SAME amount of force, which of the two will accelerate the most?

a)

The lighter (object 1) because the object's inertia in comparison to the heavier is easier to overcome hence, making object 1 speed up more than object 2.

b)

The heavier (object 2) because the more the inertia the more the object will accelerate

c)

They don't accelerate because they travel at the same rate

d)

They both have the same acceleration because the same amount of force is being exerted on the objects.

78.
It takes more force to accelerate the iron man on the left than the iron man on the right because the iron man on the left has more mass. This best describes
a)
Newton's first law, the law of inertia
b)
Newton's second law, the law of acceleration
c)
Newton's third law, the law of action reaction 
d)
The law of universal gravitation
79.

Consider the scenario of a skydiver falling down toward earth. Which of the following is true?

a)

The earth is pulling down on the skydiver with a gravitational force, but the skydiver does not exert a gravitational force on the earth.

b)

The earth is pulling down on the skydiver with a gravitational force, and the skydiver is pulling up on the earth with an equal gravitational force.

c)

The earth is pulling down on the skydiver with a large gravitational force, and the skydiver is pulling up on the earth with a small gravitational force.

d)

Neither the earth nor the skydiver can exert a force on each other because they're too far away.

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